Starting Ch 4

ch_03/break_and_continue/compile.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+if [ ! -d "bin" ]; then
+    mkdir bin
+    echo "Created bin directory"
+fi
+
+gcc -c main.c -std=gnu99 -o bin/main.o -O3
+
+gcc bin/main.o -std=gnu99 -o bin/a.out -O3

ch_03/break_and_continue/main.c

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+#include <stdio.h>
+
+int main()
+{
+    const int ARRAY_SIZE = 9;
+    const int bills [] = { 60, 35, 61, 160, 30, 15, 200, 15, 25 };
+
+    printf("Going through bills\n");
+    //
+    // Demonstrating the use of break
+    int bills_over = 0;
+    const int BILL_TOLERANCE_LIMIT = 59;
+
+    for (int i = 0; i != ARRAY_SIZE; ++i)
+    {
+        if (bills[i] > BILL_TOLERANCE_LIMIT)
+        {
+            bills_over++;
+        }
+
+        printf("%d\n", bills[i]);
+
+        if (bills_over > 2)
+        {
+            printf("These bills are killing me\n");
+
+            break;
+        }
+        else if (bills_over == 2)
+        {
+            printf("If I see one more bill above %d...\n", BILL_TOLERANCE_LIMIT);
+        }
+    }
+
+
+    const int collection_of_numbers[] = { 12, 88, 43, 13, 97, 45, 333, 245, 1093 };
+
+    printf("\nGoing through a collection of numbers\n");
+
+    for (int i = 0; i != ARRAY_SIZE; ++i)
+    {
+        if (collection_of_numbers[i] % 2 == 0)
+        {
+            // skipt even numbers
+            continue;
+        }
+
+        printf("%d ", collection_of_numbers[i]);
+    }
+
+    printf("\n");
+
+    return 0;
+}

ch_03/goto/compile.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+if [ ! -d "bin" ]; then
+    mkdir bin
+    echo "Created bin directory"
+fi
+
+gcc -c main.c -std=gnu99 -o bin/main.o -O3
+
+gcc bin/main.o -std=gnu99 -o bin/a.out -O3

ch_03/goto/main.c

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+#include <stdio.h>
+
+
+/* From what i gathered from the author of the C programming boook is that
+ * gotos are highly discouraged, although they have their uses. Goto is
+ * essentially a stronger version of the break statement. Code can become
+ * more difficult to read as more gotos are used.
+ */
+
+int main()
+{
+    const int ARRAY_SIZE = 9;
+    const int numbers1[] = { 60, 35, 61, 160, 30, 15, 200, 15, 25 };
+    const int numbers2[] = { 3, 2, 50, 4, 88, 3, 29, 91, 39 };
+
+    printf("Going through numbers, trying to find a negative number\n");
+    // Demonstrating the use of goto
+    int negative_product = 0;
+    const int BILL_TOLERANCE_LIMIT = 59;
+
+    for (int i = 0; i != ARRAY_SIZE; ++i)
+    {
+        for (int j = 0; j != ARRAY_SIZE; ++j)
+        {
+            int product = numbers1[i] * numbers2[j];
+
+            if (product < 0)
+            {
+                negative_product = product;
+
+                goto found_negative;
+            }
+
+            if ((j + 1) == ARRAY_SIZE && (i + 1) == ARRAY_SIZE)
+            {
+                goto no_negative_found;
+            }
+        }
+    }
+
+no_negative_found:
+        printf("Did not find any negative products\n");
+
+        return 0;
+found_negative:
+        printf("Found a negative product: %d\n", negative_product);
+
+
+    return 0;
+}